Extraction of Ni and Co via D2EHPA in the Presence of Acetate Ion

Document Type: Research Article


Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, P.O. Box 15875-4413 Tehran, I.R. IRAN


The effect of acetate ion introduced to aqueous solutions was investigated for the extraction/separation of Ni and Co from a dilute sulfate media. The separation of Co and Ni was improved by introducing acetate to aqueous media. By the use of the slope analysis method,the stoichiometric coefficient of the extractant was found to be 4 for cobalt and 3.5 or 4 for nickel depending on the acetate concentration. Fourier Transform Infrared Spectroscopy (FT-IR) was utilized to examine the probable“metal-acetate-D2EHPA” complexes. Increasing the level of acetate, up to 0.4 M showed a relatively significant effect on the extraction curve of Ni, but there was no influence in the Co extraction curve. At the acetate level of 0.6 M, the pH difference at 70 extraction percentage reached ~0.55 in compared to ~0.2in the absence of acetate.


Main Subjects

[1] Buzatu M., Saceanu S., Petrescu M.I., Ghica G.V., Buzatu T., Recovery of Zinc and Manganese from Spent Batteries by Reductive Leaching in Acidic Media, Journal of Power Sources, 247: 612-617 (2014).

[2] Li L., Zhai L., Zhang X., Lu J., Chen R., Wu F., Amine K., Recovery of Valuable Metals from Spent Lithium-Ion Batteries by Ultrasonic-Assisted Leaching Process, Journal of Power Sources, 262: 380-385 (2014).

[3] Jha M.K., Kumari A., Jha A.K, Kumar V., Hait J., Pandey B.D., Recovery of Lithium and Cobalt from Waste Lithium Ion Batteries of Mobile Phone, Waste Management, 33: 1890-1897 (2013).

[5] Kang J., Senanayake G., Sohn J., Shin S.M., Recovery of Cobalt Sulfate from Spent Lithium Ion Batteries by Reductive Leaching and Solvent Extraction with Cyanex272, Hydrometallurgy, 100: 168-171(2012).

[6] Nadimi H., Amirjani A., Haghshenas Fatmehsari D., Firoozi S.,Azadmehr A., Effect of Tartrate Ion on Extraction Behavior of Ni and Co via D2EHPAin Sulfate Media, Minerals Engineering, 69: 177–184(2014).

[7] Darvishi D., Haghshenas D.F., Keshavarz Alamdari E., Sadrnezhaad S. K., Halali M., Synergistic Effect of Cyanex 272 and Cyanex 302 on Separation of Cobalt and Nickel by D2EHPA, Hydrometallurgy, 77: 227-238 (2005).

[8] Vang X., Liu F., Ye H., Zhang X., An Extraction Study of Gallium and Indium from Chloride and Sulphate Media with Sec-Nonylphenoxy Acetic Acid in Kerosene, Iran. J. Chem. Chem. Eng. (IJCCE), 29(2): 19-25 (2010).

[9] Jafari S., Yaftian M.R., Parinejad M., A Study on the Extraction of Cd(II), Co(II) and Ni(II) Ions by Bis(2-Ethylhexyl) Phosphoric Acid and 2-Thenoyltrifluoroacetone, Iran. J. Chem. Chem. Eng. (IJCCE), 30(3): 89-96 (2011).

[10] Xing P., Wang C., Ju Z., Li D., Yin F., Chen Y., Xu S., Yang Y., Cobalt separation from Nickel in Sulfate Aqueous Solution by a New Extractant: Di-Decylphosphinicacid (DDPA), Hydrometallurgy, 113-114: 86-90 (2012).

[11] Flett D.S., Cobalt–Nickel Separation in Hydrometallurgy: A Review, Chem. Sustain. Develop., 12: 81-91 (2004).

[12] Okewole A. I., Magwa N. P., Tshentu Z.R., The Separation of Nickel(II) Frombase Metal Ions Using 1-Octyl-2-(20-Pyridyl)Imidazole as Extractant in a Highlyacidic Sulfate Medium, Hydrometallurgy, 121-124: 81-89 (2012).

[13] Zhu Z., Zhang W., Pranolo Y., Cheng C.Y., Separation and Recovery of Copper,nickel, Cobalt and Zinc in Chloride Solutions by Synergistic Solvent Extraction, Hydrometallurgy, 127-128: 1-7 (2012).

Volume 34, Issue 4 - Serial Number 76
November and December 2015
Pages 61-67